Rotary engine.



PATENTBD JUNE 20, 1905.

K. A. A. STAAHLGREN.

ROTARY ENGINE.

APPLICATION FILED JULY 2, 1904.

5 I THE SSE S NITED STATES Patented June 20, 1905.

KARL A. A. STAAHLGREN, OF NEW YORK, N. Y., ASSIGNOR, BY DIRECT AND MESNEASSIGNMENTS, TO THE ENGINEERING 8: DEVELOPMENT COMPANY OF NEW YORK, OFNEW YORK, N. Y., A CORPORATION OF NE VV YORK.

ROTARY ENGINE.

SPECIFICATION forming part of Letters Patent No. 792,625, dated June 20,1905.

Application filed July 2, 1904. Serial No. 215,089,

To roll whom, it may concern.-

Be it known that I, KARL A. A. STAAHLGREN, a subject of the King ofDenmark, residing at New York, in the county of New York and State ofNew York, have invented certain new and useful Improvements in RotaryEngines, of which the following is a specification, such as will enablethose skilled in the art to which it appertains to make and use thesame.

The object of this invention is to provide a rotary engine which takesfull advantage of the expansive force of steam or other motive fluid, afurther object being to provide such an engine which may be reversed atwill by simply moving a suitable lever and in which the amount of motivefluid admitted to the same may be accurately gaged, thereby obtainingthe greatest power from the least amount of steam or other fluid, and astill further object being to provide such an engine which is small,compact, powerful, economical in construction and operation, and welladapted for the purpose for which it is intended.

The invention is fully described in the following specification, ofwhich the accompanying drawings form a part, in which the separate partsthereof are designated by suitable reference characters in each of theviews, and in which Figure 1 is a vertical section of an engineconstructed according to my invention, taken on the line 1 1 of Fig. 2;and Fig. 2, a horizontal section thereof on the line 2 2 of Fig. 1.

In the drawings forming part of this specification I have shown a casing(4, comprising a body portion (6 front member (1/ and rear member a",the member a being in turn provided with a supplemental casing a andcover a therefor, and the casing a is formed into three intersectingtransverse circular chambers a a, and a, there preferably being aplurality of the chambers a as indicated in Fig. 2, and these chambers aare enlarged at their peripheries to form piston-chambers and in whichthe pistons b are adapted to move.

The pistons bare mounted upon disks Z1 filling the narrow portions of,the chambers a and are in turn mounted upon sleeves 6 secured to a shaft7), to which, within the supplemental casing a is also secured agearwheel 5 and each of the piston-disks b carries but one of thepistons b, said pistons being oppositely arranged, as clearly shown, andthe pistons b may be provided with any suitable packing, as will beunderstood.

Passing centrally through the chamber a is a shaft 0, provided with agear-wheel c of the same size as the gear-Wheel 7f, with which it isengaged, and secured to the shaft 0 is an abutment c", closely engagingthe sides of the chamber a said abutment being provided with a recess 0*for each of the pistons 72, and which are adapted to pass thereinto, andbecause of the gear-wheels 6 and 0 the pistons 6 always enter thecorresponding recess 0.

Rotatably mounted in the chamber a is a tube (Z, provided with a recessd passing almost around the outside thereof, and said tube (Z is alsoprovided with a port (Z adapted to communicate with the correspondingpistonchamber, said tube being provided with an external handle d, whichupon being moved revolves the tube (Z until the port (Z communicateswith one of two passages passing around the piston-chamber a andcommunicating with opposite sides thereof, and when the port (Z is socommunicated with one of the passages (Z or cl the recess 6Z2communicates with the other one thereof and with the exhaust-pipe (Z andthe outer air.

Vithin the tube d is a sleeve 6, provided with ports 0 passing partiallyaround the same, and each of which is opposite the corresponding port cland piston-chamber a and to the end of the sleeve 6 is secured agear-wheel 6 similar to and engaging the gear-Wheel I), and the sleeve 6therefore rotates at the same speed as the pistons and the shaft 6', andwithin the sleeve 6 and tube (Z is a pipe f, which extends outside ofthe casing a and to the closed outer end of which is secured a lever orother suitable device f by which the pipe f may be revolved, andadjacent to the outer end of the pipe f are a bers, intermittently,means for rotating said pistons, abutment and valve, correspondingly, 5and means for rotating said pistons, abutment and valve in oppositedirections, alternately, substantially as shown and described.

In testimony that I claim the foregoing as my invention I have signed myname, in pres- 2O ence-of the subscribing Witnesses, this 30th day ofJune, 1904:.

KARL A. A. STAAHLGREN.

WVitnesses:

E. H. TUsKER, J. R. QUINN.

